There are even ones in pencil stuck to the leaves of plants. When I was a child I once went round the house tearing all the stickers off; I was belted and sent to my room for two days. Later my father decided it would be useful and character-forming for me to know all the measurements as well as he did, so I had to sit for hours with the Measurement Book (a huge loose-leaf thing with all the information on the little stickers carefully recorded according to room and category of object), or go round the house with a jotter, making my own notes. This was all in addition to the usual lessons my father gave me on mathematics and history and so on. It didn't leave much time for going out to play, and I resented it a great deal. I was having a War at the time — the Mussels against the Dead Flies I think it was — and while I was in the library poring over the book and trying to keep my eyes open, soaking up all those damn silly Imperial measurements, the wind would be blowing my fly armies over half the island and the sea would first sink the mussel shells in their high pools and then cover them with sand. Luckily my father grew tired of this grand scheme and contented himself with firing the odd surprise question at me concerning the capacity of the umbrella-stand in pints or the total area in fractions of an acre of all the curtains in the house actually hung up at the time.

"I'm not answering these questions any more," I said to him as I took my plate to the sink. "We should have gone metric years ago."

My father snorted into his glass as he drained it. "Hectares and that sort of rubbish. Certainly not. It's all based on the measurement of the globe, you know. I don't have to tell you what nonsense that is."

I sighed as I took an apple from the bowl on the window sill.